A derivative-free noncircular fan-beam reconstruction formula was brought forward by Ge Wang,,Tein-Hsiang Lin and Ping-chin Cheng. And they proved that the formula was accurate under the condition that the three assumptions were satisfied.

• 资料WANG Ge等人在《A Derivative-Free Noncircular Fan-Beam Reconstruction Formula》中提出了一个不含源到中心距离导数的重建公式,并证明在满足三个假设的条件下该公式是一个准确重建公式。